MEMBRACIDAE Ceresa diceros (Say).
This species, which is abundant in some locations, has not been observed commonly and probably is restricted to sonic food plant which is not abundant here. Cranberry Lake, Aug. 1 and Sept. 15, 1917. Wanakena, Aug. 1-7, 1917.
Ceresa bubalus (Fabricius).
The Buffalo tree-hopper, which is such a very abundant species throughout the country, occurs here only sparingly and is evi dently not a forest species but adapted to open areas or particu larly to annuals or shrubs. Where abundant, the eggs being de posited in branches or twigs of trees have occasioned very consider able injury, but owing to its scarcity it might be considered of no economic importance for this region and probably for the Adirondacks generally. Cranberry Lake and Barber Point, Aug. 9, 1920. Wanakena (Ranger School), Aug. 12, 1920.
Ceresa basalis Walker (Fig. 14, a and b).
This is the most common species of the genus for the Adirondack region and is found in low ground on the grasses and annual plants. It is sufficiently abundant to be counted distinctly in jurius for the plants on which its occurs. The species is northern in its distribution and, except for high land, shades out into about the latitude of the Adirondacks. Cranberry Lake, July 2S, Aug. 1, 1917 ; Sept. 15, 1917; July 30, 1920; Aug. 10, 1920. Wanakena, Aug. 1-7, 1917. Plains, Aug. 3, 1920.
This is the most abundant species observed affecting the forest trees in the region and more detail is given in the section devoted to its life history. Cranberry Lake, July 28, 1918; nymphs abun
dant on birch, July 2-15, still present July 29, 1920; adults, July 13, Aug. 11, 1920. Wanakena, Aug.'1-7, 1917.
This species has been noted as quite common on willows and might be considered an economic species if the willows were of greater commercial value. •Cranberry Lake, July 11; Aug. 4, 1917.
The specimens referred to here agree closely with description by Van Duzee, except that the marking are more profuse.
Wanakena, Aug. 1-7, 1917. A single nymph which may very probably belong to this species was taken from poplar.
Telamona coryli Fitch.
Wanakena, July 15 and Aug. 12, 1920; beaten from Corylus.
Publilia concava (Say).
A common, often abundant species of wide range but not taken here except at the Plains, Aug. 3, 1920.
Campylenchia latipes (Say).
Cranberry Lake, Sept. 15, 1917, July and Aug., 1920. Plains, Aug. 3, 1920. Very common, especially where leguminous plants furnish appropriate food.
Enchenopa binotata (Say). Plains, Aug. 3, 1920.
Microcentrus caryae (Fitch). Cranberry Lake, July 11, 1917.